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为实现多输入多输出(MIMO)再生中继网络中源节点和目的节点之间的协作传输,提出了一种中继选择算法.被选中的中继节点的两跳链路等效功率增益的最小值在所有备选中继节点中最大.针对该选择策略,采用一种理论近似的方法分析了其中断概率.基于这种协作策略还给出了在总功率受限的条件下,源节点和中继节点之间的功率分配方法.理论分析和仿真结果表明,该选择算法可显著降低系统中断概率.同时,分布式的选择算法在系统性能和复杂度之间取得了较好的平衡,是可使用的中继选择策略.
In order to realize the cooperative transmission between the source node and the destination node in a multiple-input multiple-output (MIMO) regenerative relay network, a relay selection algorithm is proposed. The two-hop link equivalent power gain of the selected relay node The minimum is the largest among all the candidate relay nodes.Aiming at this selection strategy, a theoretical approximation method is used to analyze its outage probability.Based on this cooperation strategy, under the condition of total power limitation, the source node And relay nodes.A theoretical analysis and simulation results show that the proposed algorithm can significantly reduce the system outage probability.At the same time, the distributed selection algorithm achieves a good balance between system performance and complexity, Is a trunk selection policy that can be used.